REMOVABLE RESET KEY
TYPE B ALUMINIUM
FASCIA GRILLE
TEST FACILITY
INDICATION LIGHT
THERMAL CIRCUIT BREAKER
AIRFLOW
GALVANISED STEEL
FRAME CONSTRUCTION
DRIVE RACK
Gilberts Smokegard Modes B & C have been
designed to allow the passage of ventilation air in
normal conditions and prevent the spread of
smoke and flames in fire conditions. They are
available in a wide range of sizes to cater for most
air flow requirements and are supplied complete
with a door sleeve and electrical door wiring loop
for a 45mm or 54mm door or a wall sleeve only,
for a wall/partition. The damper can be suitably
masked on both sides either with steel type A
grilles or aluminium non-vision type B grilles.
Operation: The units are operated by a 24V DC
electrical supply. This 24V DC supply provides
power for the damper’s integral electro magnet
which in normal conditions hold the damper
blades open. In fire conditions, however, when the
fire protection system detects the presence of fire
or smoke, it will interrupt the power supply to the
damper causing the electro magnet to release the
blades. The damper will then close instantly under
spring tension.
If fire were to reach the damper without such
detection, the unit would close regardless of
external sources at 72°C by the action of its
integral Electro thermal fuse.
Reset procedure: Reset or initial setting, which
can be accomplished with the fascia grilles in
place, is achieved by the insertion of a special key
through a hole in the grille and damper frame.
With the main 24V DC supply live the key is
turned in a clockwise direction until the blades are
fully open. The electro magnet will then lock and
hold the blades and the key can be removed.
Mode Descriptions
Mode B - Mode B units are supplied without status indication light
or key test facility.
Mode C - Mode C units are supplied with an LED status
indication light and key test facility. The LED visibly
indicates the damper status even when behind a fascia
grille. In normal conditions the LED indicates a steady
green; in system trip conditions a steady red and in
power failure conditions provides no display. Inserting
the special key into the test facility socket provides for
easy local testing of damper operation.
NB - Extra facilities available on Modes B & C include
remote status indication, remote operation and
integrally wired smoke detector operation. Please refer
to wiring diagram for details.
Mode
B and C
HOLDING ELECTRO MAGNET
Mode B and C
Smoke and
Fire Operated
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